 | | GP2D05
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Hi Anybody got the GP2DO5 IR module working with the Handyboard (without expansion board) using IC ? I always seem to get a Logic "1" from the detector even if there are no obstacles in front of the detector. Any hints will be greatly appreciated. (...) (25 years ago, 27-Oct-99, to lugnet.robotics.handyboard)
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| | Re: Servo 16 pgm +SPI on HC11
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I have to admit that I have not actually finished the project, work commitments meant that it was shelved for a while. The easiest way to communicate to the HC11 is to use the software from the HB website that allows you to use one of the pins on (...) (25 years ago, 27-Oct-99, to lugnet.robotics.handyboard)
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| | Debugging
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I am developing a course at SJSU using the handyboard as the microcontroller for a competition being held at the end of the semester. This new course have us build the handyboard from scratch and go through the debugging process. I have help some (...) (25 years ago, 27-Oct-99, to lugnet.robotics.handyboard)
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| | Re: Expansion Board and Smooth PWM
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Bill, after unzipping the files, copy all the downloaded drivers into your interactive C Libs directory. These drivers must reside in this directory (drive:\IC\Libs) in order for IC to load them at startup. You will be asked if you want to replace (...) (25 years ago, 27-Oct-99, to lugnet.robotics.handyboard)
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| | Re: motor current trick
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A couple of easy things that you can do to increase the current capabilities of the motor drivers are: (1) replace the L293Ds with SN754410 chips (available from Acroname), and (2) piggyback one H-bridge chip on top of the other to handle almost (...) (25 years ago, 27-Oct-99, to lugnet.robotics.handyboard)
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| | motor current trick
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I've got a great R/C track vehicle that I want to use as a robot chassis, problem is the 1 Amp motors. I was going to use Kam's suggestion, but then I saw the Sonar schematics. I noticed that the sonar schematics have power coming from the motor (...) (25 years ago, 27-Oct-99, to lugnet.robotics.handyboard)
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| | Re: Sharp GP2D02 with out expansion board
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Gary, Cool! Could you tell me how you wired it up? I'm a real beginner here and don't know exactly what you mean on that web page by: "This example assumes that port PA5 on the Handy Board was connected to the input of the GP2D02 detector and that (...) (25 years ago, 27-Oct-99, to lugnet.robotics.handyboard)
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| | Re: MOTOR DRIVERS
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I also remember seeing people piggybacking the L293s to double the current capability. Thoughts? -chris ----- Original Message ----- From: Fred G. Martin <fredm@media.mit.edu> To: <handyboard@media.mit.edu> Sent: Monday, October 25, 1999 2:26 PM (...) (25 years ago, 26-Oct-99, to lugnet.robotics.handyboard)
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| | line-followers
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Hi all, I would greatly appreciate information on line-followers and oscillating DC wire-followers to use with the Handy Board. Which models are the most practical? Where can I find the specs and instructions for these models? What is the code for (...) (25 years ago, 26-Oct-99, to lugnet.robotics.handyboard)
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| | 64K UPGRADE
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When upgrading to 64K, could that be done when still using Interactive C? By the way, what's the main difference between 2.8 and 3.X versions? Advantanges and Disavantages!!! Thanks, Paul (25 years ago, 26-Oct-99, to lugnet.robotics.handyboard)
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| | Eltec 442 Pyroelectric Sensor
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Hi, I purchased an Eltec 442-3 Pyroelectric Sensor from acroname. I know pin 1 is V+ 5V but I don't know how I should connect pin 2,3,4 to my handy bord/expansion board. I want to use the sensor for detecting people and/or candles. How do I connect (...) (25 years ago, 26-Oct-99, to lugnet.robotics.handyboard)
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| | Re: fried memory
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it might not be permanently dead, but if it's not, it's not working. one (or more) of the outputs of these two chips is probably shorted to ground or shorted to +5v. the chips get hot when they try to drive this output to a state other than the one (...) (25 years ago, 26-Oct-99, to lugnet.robotics.handyboard)
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| | fried memory
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I suspect that I fried my memory chip. The handyboard downloads Pcode perfectly, but when it tries to synchronize with interactive C, I get an error. While the board is off the 62256-12LP and the 74HC132 chips stay hot. is there a good diagnostic (...) (25 years ago, 26-Oct-99, to lugnet.robotics.handyboard)
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| | Expansion Board and Smooth PWM
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I really need to know how to get all my files correct to run both the expansion board and the smooth PWM routines at the same time. I downloaded both zip files but am unsure which files to use. Did I miss something on the web page where it says how (...) (25 years ago, 26-Oct-99, to lugnet.robotics.handyboard)
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| | Re: MOTOR DRIVERS
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(...) Hi Paul, I don't know how the handyboard is protected against overload but one thing is for sure : if you overload the driver chip ... this one will fry up.In worst case you'll fry the board as well. If a driver chip's maximum current is 1 (...) (25 years ago, 25-Oct-99, to lugnet.robotics.handyboard)
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| | Re: MOTOR DRIVERS
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It won't necessarily fry the chip. L293s (and the TI equivalent) have a thermal protection mode. If the chip gets too hot, it will turn itself off. Most of the time, this protects the chip against over-current. However, it is still possible to fry (...) (25 years ago, 25-Oct-99, to lugnet.robotics.handyboard)
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| | Re: MOTOR DRIVERS
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(...) Hi Paul, I think it would take out the chip, but I am currently doing this by installing a oversize heatsink & fan to the controller chip and pulsing the motor instead of constant current. Exceeding the max current capacity but, limiting (...) (25 years ago, 25-Oct-99, to lugnet.robotics.handyboard)
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| | Re: MOTOR DRIVERS
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Answer it'll fry the chip Question? Why would you even want to do that? (...) (25 years ago, 25-Oct-99, to lugnet.robotics.handyboard)
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| | MOTOR DRIVERS
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Question? When using a motor which will exceed the driver chip max current, will that fry the chip or the handy board? Paul (25 years ago, 25-Oct-99, to lugnet.robotics.handyboard)
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| | Compiler Errors keep my board from loading
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Help!! I don't know how to fix compiler errors! Specifically, I received the following error: "Compiler error! 47 extra bytes left on board stack. " and I don't know how to fix it. I do know that I cannot load programs on my board until I fix the (...) (25 years ago, 25-Oct-99, to lugnet.robotics.handyboard)
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